/*
* Copyright 2008 Lukas Vlcek
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package org.permutation;

import java.io.IOException;
import java.util.Iterator;

import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.MapReduceBase;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.Reporter;

public class PermutationReduce extends MapReduceBase implements Reducer<Text, Text, NullWritable, Text> {
    public void reduce(Text key, Iterator<Text> values, OutputCollector<NullWritable, Text> output, Reporter reporter) throws IOException {
        while (values.hasNext()) {
            output.collect(NullWritable.get(), values.next());
        }

    }
}
